动力单元在力量控制任务期间的射击特性以及与儿童神经测试的关联
Masamichi Okudaira1,2, Ryosuke Takeda1, Tetsuya Hirono1,3
1Laboratory of Neuromuscular Biomechanics, School of Health and Sport Sciences, Chukyo University, Toyota,Japan.
Pediatric exercise science
|August 8, 2023
概括
动力单元的火速变化对于儿童精确的力量控制至关重要,但随着年龄的增长,它不会自然发展. 这种神经属性显著影响着个体发育中的力量稳定性.
科学领域:
- 神经肌肉生理学 神经肌肉生理学
- 发育运动控制 发育运动控制
- 儿科运动科学 儿科运动科学
背景情况:
- 了解儿童运动控制的发展对于识别影响运动表现的因素至关重要.
- 发动机单元 (MU) 的特性,如火速和可变性,对于强制生产和稳定性至关重要.
- 以前的研究还没有完全阐明MU发射特征和儿童发育期间的强力稳定性之间的关系.
研究的目的:
- 调查6-12岁儿童运动单元发火性质的发育轨迹.
- 为了检查神经属性 (MU发射) 和力稳定性 (FS) 在这个年龄组之间的关联.
- 探索MU发射特征与标准神经测试之间的关系.
主要方法:
- 在38名儿童 (6-12岁) 的力稳定性测试中,使用高密度表面电动图来记录巨大的横向肌肉活动.
- 参与者进行了最大的自愿膝盖延伸,次最大FS测试,反应时间测试和单腿站立测试.
- 分析了与年龄和力稳定性相关的动力单元发射速度 (MUFR) 和MUFR变异性.
主要成果:
- 随着年龄的增长,强力稳定性显著改善 (r = -540,P < .001).
- 机动单元发射率 (MUFR) 随着年龄的增长显著下降 (r = -.343,P = .035),而MUFR的变异性没有显示年龄相关性.
- 强力稳定与独立于年龄的MUFR可变性有显著的相关性 (r = .551,P = .002),但与MUFR没有直接相关性.
结论:
- 发动机单元发射速率的变化对于在儿童中实现精确的力控制起着至关重要的作用.
- 与力稳定性和MUFR不同,MUFR的变性似乎不会随着儿童年龄的增长而系统地发展.
- 神经学测试 (反应时间,单腿站立) 在这个队列中没有发现与MU发射特性相关.
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